The code scroll bar is way too thin, very difficult to click and drag. This may be inherited from some third party code (Code Mirror?), but I am hoping there is a way to tweak this setting somehow and have a more reasonable default in OneDev?

This likely comes from the mistaken idea that scrollbars don't need to be thick because people either don't use them or they are using a touch screen where their finger is big and will touch the scrollbar somehow. This is mobile devices user experience decisions contaminating and severely affecting the usability of desktop PC platforms. There really is nothing wrong with a few more pixels reserved to display a thicker scrollbar!!